Question

我有这段代码：

f = open('File4Gym.dat')
try:
    db = lite.connect('/var/www/members.db')
    fieldnames = ('Shop', 'PUC Code Num', 'Name', 'Date/ Reason', 'Amount', 'T', 'PUC Code', 'Status', 'Date')
    reader = csv.DictReader(f, fieldnames=fieldnames)
    for row in reader:
            for fieldnames in row.items():
            #print row
                    if fieldnames[5] <> '0.00' or '14.95' or '16.95':
                            print "Committing INSERT"
                            c = db.execute("""INSERT "debit" = '%s' FROM "members" WHERE "puccode" = '%s'""" % (fieldnames[5], fieldnames[7],))

返回错误：

pi@raspberrypi ~ $ python cronjob3.py
Traceback (most recent call last):
File "cronjob3.py", line 13, in <module>
if fieldnames[5] <> '0.00' or '14.95' or '16.95':
IndexError: tuple index out of range

我如何引用csv.DictReader中的各个字段并插入除＆＃34之外的值;如果＆＃34;声明进入SQL表？

示例文件（根据要求提供）：

"Shop Name",PUCLxxx,"Customer 1","09/09/2014",0.00,T,"PUCLxxx","Closed Account ",20140909
"Shop Name",PUCLyyy,"Customer 2","09/09/2014",0.00,T,"PUCLyyy","Closed Account ",20140909

非常感谢！

Answer 1

您想要访问哪个fieldnames？您将其定义为('Shop', 'PUC...，然后使用for fieldnames in row:。我想其中一个需要重命名。

新fieldnames必须短于6个元素。尝试在循环中打印出来以查看返回的内容。

编辑：我想我发现了这个问题。

您for fieldnames in row.items(): fieldnames对字典row中的键/值对进行迭代的位置。每对都是一个2元组，所以5个超出范围。

我认为用以下内容替换你的for循环应该做你想要实现的目标

for row in reader:
    if row['Amount'] <> '0.00' or '14.95' or '16.95':  #is this the field you were after?
        print "Committing INSERT"
        c = db.execute("""INSERT "debit" = '%s' FROM "members" WHERE "puccode" = '%s'""" % (row['Amount'], row['PUC Code Num'],))

作为旁注，您希望在if row['Amount'] <> '0.00' or '14.95' or '16.95':条件下实现什么目标？正如它所写，它将永远是真的。如果您想检查金额是不是0.00或14.95或16.95之一，请使用if row['Amount'] not in ('0.00', '14.95', '16.95'):

PS：fieldnames [5]会返回'T'而不是'Amount'，因为列表是0索引。

Python dict元组超出范围

1 个答案: